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Models
Foundation models and notable fine-tunes - closed frontier and open weights.
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Open weights
263
Closed weights
409
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Step 3.5 Flash
· Stepfun
Open weights
2 Apr 2026
Step 3.5 Flash
· Stepfun
2 Feb 2026
Step3 VL 10B
· Stepfun
20 Jan 2026
Step 11
Step 19
Step 1o Turbo
· Stepfun
Closed weights
Step 1o Vision 32k Highres
· Stepfun
Closed weights
Step 1v
· Stepfun
Closed weights
Step 1v 32k
· Stepfun
Closed weights
Step 2 16k Exp
· Stepfun
Closed weights
Step 3
· Stepfun
Open weights
Step 5 Preview High
· Stepfun
Closed weights
Step 7